Pipe-coupling.



N0. 879,550. PATENTBD FEB. 18, 1908.

G. A. HUFFMASTBR.

PIPE COUPLING.

APPLICATION mum 1TOV.20, 1906.

WITNESSES: Y Y INVENTOR A TTORNE Y UNITED STATES PATENT OFFICE.

CHARLES A. HUFFMASTER, OF SAN LEANDRO, CALIFORNIA. 1

PIPE-COUPLING.

Specification of Letters Patent.

Patented Feb. 18, 1908.

Application filed November 20. 1906. .Serial No. 344.209.

To all whom it may concern:

' Be it known that I, CHARLES A. HUFF- MASTER, citizen of United States, residing at San Leandro, in the county of Alameda and in details of construction which will be more fully explained by reference to the accompanying drawings, in which Figure 1 is a longitudinal section of my coupling showing a conical seat. Fig. 2 is In the connection of pipes, hose or similar passages designed to convey fluid, it is customary to employ leather, rubber or equivalent gaskets which are clamped between the meeting ends of theparts to be coupled to prevent the escape of the fluid at such points. My invention is designed to provide a durable and eflicient means for forming a joint at the-junction of such conductors and one which cannot be destroyed by high temperatures or pressure.

As shown in the drawings A and B aretwo 1 sections of pipe which are to be connected. One of these sections has the usual screwtlireaded flange 2 at the end, and the other has the enlarged plain flange 3.

-' is screw-threaded to engage with the screwthreaded'end 2 of the pipe B.

t is a shouldered sleeve or coupling device having an inwardly turned flange at one end which engages with the plain collar 3 of. one

of the sections and the other end of the'sleeve The union is made in the usual manner: by turning the sleeve 4, the periphery of the sleeve being made polygonal or otherwise provided with means for readily turning it until the meeting ends are forced together.

In order to make a tight joint at this point,-

I employ a metal sleeve 5, which may be made of any soft compressible metal, such as'copper.

The interior of the.head 2 of the pipe B has an annular depression made in it as 'shown at.6. The sleeve 5 is expanded or spun into the interior of the head so as to fit and be interlocked with the depression 6, thus retaining it firmly in place.

In Fig. 1, I have shown the end of the pipe A as made slightlyconical as at 7, and the corresponding end of the pipe B is beveled so as to correspond in shape with the cone 7. The outer end of the sleeve 5 is expanded While being spun into place so that its 'surface is beveled or inclined to correspond with the bevel 7 of the part A, and by turning the coupling sleeve 4, the parts are drawn together and a conical-shaped valve and seat are formed hetween the pipes. I

In Fig. 2 I have shown the meeting ends of the pipes as being flat, and in this case the projecting end of the sleeve 5 is turned over in the spinnin or fittin process until it is substantially atupon liI'ie end of the head 2. The end of the head A in this case is also made flat and is seated upon the soft metal flange so as to form a ti ht joint, as in the previous construction. y the use of this joint forming sleeve or gasket of metal, I am enabled to employ pipes and connections which are made of iron and'are very cheap, while the amount of copper, lead, or other soft metal to formthe joint is comparatively small. A joint formed in this manner can- 'not be blown out by any pressure, and it is exceedingly durable and permanent, not bein affected by hot liquids or gases.

aving thus described my invention, what Iclaim and desire to secure by Letters Patent, is

Theconibination with pipe sections and a union sleeve or collar therefor, one of said sections having an annular depression on its interior, and a tubular sleeve of soft compressiblemetal having a portion intermediate of its ends expanded into said depression to permanently lock the sleeve to the section, and having its outer end turned outwardly and adaptedlto be clamped between the adjacent'ends of the sections. In testimony whereof I have hereunto set n'esses.

, CHARLES A. HUFFMASTER. Witnesses: I

T110. H. JoHNsoN, A. B. THOMAS.

my hand in presence of two subscribing .wit 

